User's Manual

96 Power Quality Analyzer Model 3945-B
APPENDIX B
GLOSSARY OF TERMS
Symbol Denition
F Frequency
Vrms Volts rms
Arms Amps rms
W Watts(RealPower)
PF Power Factor
Urms Volts(phase-to-phaserms)
Vthd Volts total harmonic distortion
Athd Amps total harmonic distortion
VARS VARS(reactivepower)
DPF Displacement power factor
Uthd Voltstotalharmonicdistortion(phase-to-phase)
Vcf Volts crest factor
Acf Amps Crest Factor
VA Volt-Amps(apparentpower)
Tan Tangent(Volt-Amp)
Ucf Voltscrestfactor(phase-to-phase)
Vunb
Volts Unbalanced. On the instrument’s screen, the calculation
method is the IEC method that takes into account phase angle.
Aunb
Amps Unbalanced. On the instrument’s screen, the calculation
method is the IEC method that takes into account phase angle.
PST Shorttermicker
Akf “K” factor
Vh Harmonic volt
Ah Harmonic amps
3L Capture of each 3 phases
N Neutralcurrent(calculated)
Σ Sum of three-phase power capture